Board-dat/NGS/NGS1131-DAT/NGS1131-DAT.md
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@@ -79,6 +79,6 @@ auto turn ON, USB will list 3 COMs - [[A7670-dat]]
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## ref
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-- [[M2M-dat]] - [[SIMCOM-dat]]
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+- [[M2M-dat]] - [[SIMCOM-dat]] - [[serial-dat]] - [[Logic-level-shifter-dat]]
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- [[NGS1131]]
Chip-cn-dat/SIMCOM-dat/A7670-DAT/2025-04-18-20-43-46.png
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Binary files /dev/null and b/Chip-cn-dat/SIMCOM-dat/A7670-DAT/2025-04-18-20-43-46.png differ
Chip-cn-dat/SIMCOM-dat/A7670-DAT/A7670-DAT.md
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@@ -6,10 +6,36 @@
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* Default baudrate is 115200
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+## A7670 versions
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+
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+| module suffix | FDD | TDD |
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+| ------------- | ---------------------------- | ------------------- |
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+| C | B1/B3/B5/B8 | B34/B38/B39/B40/B41 |
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+| E | B1/B3/B5/B7/B8/B20 | B34/B38/B39/B40/B41 |
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+| SA | B1/B2/B3/B4/B5/B7/B8/B28/B66 | B34/B38/B39/B40/B41 |
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+
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## Hardware Design
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+| functions | check | |
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+| ----------- | ----- | -------------------------- |
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+| SIM / USIM2 | ✔ | SIM1 + SIM2 |
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+| PCM | x | |
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+| BT | ✔ | BT5 + tradtional |
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+| GNSS | ✔ | |
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+| GPIOx | ✔ | |
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+| Keyboardx | ✔ | 4x4 |
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+| ADC | ✔ | VBAT_ADC |
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+| SPI | ✔ | |
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+| I2C | ✔ | |
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+| UART | ✔ | UART main, UART Log, UART3 |
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+| SPK | ✔ | |
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+| MIC | ✔ | |
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+| LCD | ✔ | |
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+| CAM | ✔ | |
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+
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+
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### USB Functionalties
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the modern and COMs
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When the power supply can provide a continuous current of 1A, the total capacitance of the external power supply capacitor is recommended to be no less than 200uF. If a continuous current of 1A cannot be provided, the total capacitance of the external capacitor is recommended to be no less than 600uF to ensure that the voltage drop on VBAT does not exceed 300mV at any time.
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-## A7670
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+#### A7672X/A7670X has 2 LDO outputs：VDD_1V8 and VDD_2V8.
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-| module suffix | FDD | TDD |
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-| ------------- | ---------------------------- | ------------------- |
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-| C | B1/B3/B5/B8 | B34/B38/B39/B40/B41 |
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-| E | B1/B3/B5/B7/B8/B20 | B34/B38/B39/B40/B41 |
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-| SA | B1/B2/B3/B4/B5/B7/B8/B28/B66 | B34/B38/B39/B40/B41 |
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+VDD_1V8 is the module's system IO power supply, which can only provide a current capacity of 50mA. It cannot be used as a high current drive source. It can be used as a power supply for module 1V8_GNSS （PIN97）.
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+
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+VDD_2V8 is the module 2.8V LDO power output, which can only provide a current capacity of 50mA. It cannot be used as a high current drive source. It can be used as a power supply for LCD VCC_2V8.
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+
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+
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+### Keyboards
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+
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+| Signal | Pin | Voltage | Type | Description |
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+| ------- | --- | ------- | ---- | ---------------------------------- |
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+| MK_IN2 | 47 | 1.8V | DI | Keyboard input If unused, keep it |
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+| MK_IN3 | 20 | 1.8V | DI | Keyboard input If unused, keep it |
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+| MK_IN5 | 68 | 1.8V | DI | Keyboard input If unused, keep it |
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+| MK_IN6 | 36 | 1.8V | DI | Keyboard input If unused, keep it |
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+| MK_OUT2 | 44 | 1.8V | DO | Keyboard output If unused, keep it |
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+| MK_OUT3 | 21 | 1.8V | DO | Keyboard output If unused, keep it |
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+| MK_OUT5 | 67 | 1.8V | DO | Keyboard output If unused, keep it |
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+| MK_OUT6 | 35 | 1.8V | DO | Keyboard output If unused, keep it |
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+
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+### Bluetooth interface
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+
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+A7672X/A7670X module has integrated Bluetooth function inside, and only one BT antenna is left on the module interface.
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+
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+A7672X/A7670X Support BT5.0 protocol specification, compatible with BLE low power mode and traditional BT mode; It only supports Bluetooth data transmission and does not support VoiceOverPCM & VoHCI.
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+
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+### ADC
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+
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+
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+For A7672X/A7670X VBAT_ADC, the VBAT voltage range is 0~4.2V and the VBAT_ADC is used to read the battery voltage by default.
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+The hardware design of the VBAT_ADC must use 680K_1% and 470K_1% resistors for voltage division.
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+![](2025-04-18-20-43-46.png)
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## ref
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-* Documentation collection - https://github.com/Edragon/SIMCOM-A7670
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-* Windows driver you can install common SIMCOM driver here - https://github.com/Edragon/SIMCOM_2G
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-* demo video to boot and use with USB here https://w.electrodragon.com/w/Demo_Video
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+* [Documentation collection](https://github.com/Edragon/SIMCOM-A7670) - https://cn.simcom.com/product/A7670X.html
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+* [Windows driver you can install common SIMCOM driver here](https://github.com/Edragon/SIMCOM_2G)
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+* [demo video to boot and use with USB here ](https://w.electrodragon.com/w/Demo_Video)
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- [[NGS1131-dat]]
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-- [[SIMCOM-dat]]
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+- [[SIMCOM-dat]] - [[M2M-dat]]
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- [[SIMCOM]] - [[A7670]]
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Tech-dat/Network-dat/M2M-dat/M2M-dat.md
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@@ -99,10 +99,6 @@ If you're deploying or using CAT-M technology, check with the specific network p
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LBS = Base station location, AT+CLBS
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-
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-ASR1603
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-ASR1606
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-
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## Module manufacturer
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- [[fibocom-dat]] - [[simcom-dat]] - [[quectel-dat]]
Tech-dat/logic-dat/Logic-level-shifter-dat/2025-04-18-18-57-43.png
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Tech-dat/logic-dat/Logic-level-shifter-dat/Logic-level-shifter-dat.md
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@@ -7,7 +7,7 @@
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## Chip and solutions
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-bidirection logic shifter
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+### bidirection logic shifter
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- [[ti-signal-dat]]
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@@ -15,7 +15,10 @@ bidirection logic shifter
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- [[LSF0102-dat]]
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-one-direction logic shifter
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+
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+
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+
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+### one-direction logic shifter
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- [[74HCT245-dat]]
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Make sure the VCCA ≤VCCB.
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+## Simple logic shifter for VBAT
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+
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+![](2025-04-18-18-57-43.png)
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## ref